
Nelson EducationSchool  
Surf for More MathLesson 4  Area Rule for Rectangles
Use this interactive activity to encourage your child to have fun on the Web while learning about the area rule for rectangles. GoalDevelop and explain a rule for calculating the area of a rectangle. Builds UponStudent Book pages 228229
Instructions for Use
Area of Rectangles and Squares helps your child relate the length and width of a rectangle to area. To use Area of Rectangles and Squares, drag both blue buttons along the sliders to illustrate that changing the length and width of a rectangle, changes its area and perimeter. Notice how the Web page uses the area rule for rectangles to calculate the area. Count the squares in the rectangle to see if the area is correct. Check many different rectangles to see if the rule is always correct. 
